The problem of on board charger indication
2017-04-05 11:37:27 Source:Shenzhen Yininz technology co., LTD Author:引领者-温小编 Visit:154
The main reason of the unqualified goods vehicle charger has two aspects, one is some companies of lax quality control key components, such as capacitors, diodes, transformer has a direct impact on the quality of goods, some manufacturers lack of inspection techniques, the quality of the components used to produce car charger, stability and safety car charger can not guarantee the quality of the goods is two; some companies can not completely describe layout unreasonable, identify lithium batteries and nickel metal hydride batteries, all using the constant current charging method, often resulting in simple lithium battery overcharge, and battery explosion attack. The original car charger standard factory production, drawing circuit or switch circuit are selected to maintain the fine description of charging the battery to maintain, but some of the poor quality of the car charger, described briefly, only a simple transformer, short circuit maintenance, can not guarantee the safe current charging, there are the risk of even the blasting burn out the battery, the battery of the mobile phone function is harmful, greatly shorten the using life of mobile phone batteries.
The main quality problems reflected in this inspection are as follows:
1 in accordance with the rules of the rules, under the conditions of failure, the temperature of the various parts of the device can not exceed the regular requirements, equipment around the items can not have the risk of fire. There are 2 kinds of goods in the inspection of the transformer showing melting appearance, the 1 kinds of goods after the failure of the pressure test failure, the safety of the product there are serious security risks. Abnormal working conditions and fault conditions, easy to cause fire. Under the condition of short circuit of the output short circuit, capacitor or diode, etc., the internal loss of the car charger increases sharply, which leads to the increase of the temperature of each part and even the damage of the equipment.
2 wiring, connection and power supply and layout requirements. Standard plug should antimonopole Pierce, is charged when the plug is any one of the plug and the socket sleeve is inserted timely, other bolt can not reach, or very simple form by the risk of electric shock. There are 3 kinds of goods in the inspection of the unqualified, the main reason is that the bolt length is too long, the thickness of the bolt is too thin and the distance to the edge of the plug does not meet the requirements of the specification.
3 marking and instructions are not standardized. Identification mark is an important information that indicates the correct application and use of the user, and it is the most basic content to ensure the safety of the user's personal industry. There are 5 kinds of goods in the inspection of the unqualified. The main reason for the failure of the car charger for the performance of no rated current, no Chinese identity, nameplate symbol is not water, gasoline, etc..
4 unqualified electrical insulation. Electrical insulation is an important safety audit objective, the specification of the requirements in the wet test, the input and the shell, the input and output of the insulation should be strengthened to accept the 3000V voltage. The inspection of 1 kinds of goods between the input and output electrical insulation can only accept 1900V ~ 2500V pressure, there are more serious security risks.
Connected car charger input terminal to communicate directly with the 220V power supply, the output (usually less than 12V DC voltage to low voltage safety), small household electrical appliances major. Recently, the State Administration of quality inspection of the national supervision and inspection of the vehicle charger product quality, examined a total of 21 commodities and 21 companies in Guangdong, Fujian, Beijing, Zhejiang, Shandong and other 5 provinces and municipalities to produce, eligible 16 kinds, product sample pass rate of 76.2%. Car charger is a small portable power output device, the first touring car charger, car charger and car seat type car charger and other types of mobile phone battery for electric car charger essential equipment, a direct impact on the quality of mobile phone and battery effect.